Starting and maneuvering apparatus for turbine-steamers.



No. 824,727. PATENTED JULY 3, 1906. J. KRAFT.

STARTING AND MANEUVERING APPARATUS FOR TURBINE STEAMERS.

APPLICATION FILED JAN-30, 1906:

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No. 824,727. PATENTED JULY 3, 1906.

J. KRAFT. STARTING AND MANEUVERING APPARATUS FOR TURBINE STBAMBRS.

ILED JANJIO. 1906.

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lQ/PM W PATENTED JULY 3, 1906.

J. KRAFT.

STARTING AND MANBUVERING APPARATUS FOR TURBINE STEAMERS.

APPLICATION FILED JAN.30, 1906.

4 SHEETS-SHEET 3.

PATENTED JULY 3, 1906.

J. KRAFT. STARTING AND MANEUVERING APPARATUS FOR TURBINE STEAMERS.

4 SHEBTSSHEET 4.

4 Q/NVEIITOH.

APPLIGATIJA II ED JAN.3. 1906.

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I I I l l WIIWESSEQ UNITED STATES PATENT OFFICE.

JOHN KRAFT. OF J EMEPPE-SUR-MEUSE. NEAR LIEGE, BELGIUM.

Specification of Letters Patent.

Patented J uly 8, 1906.

Application filed January 80. 1906- Seth-1H0. 298.880-

.[0 all whom it may concern:

Be it known that I, J OHN KRAFT, engineer, a subject of the Emperor of Austria-Hungary, residing at J emep e-sur-Meuse, near Liege, in the Kingdom 0 Belgium, have invented new and useful Improvements in Starting and Maneuvering Apparatus for Turbine-Steamers, of which the following is a specification.

A turbine-steamer must have separate turbines for going ahead and astern. Generall speaking, these vessels are provided wit t ree sets of turbines, each driving a screw. The central or high-pressure turbine is only used for forward running, and the steam is led into it directly from the boilers. From this central turbine the steam is led into the two low-pressure turbines, from whence it escapes to the condensers. During maneuvers only the two lateral turbines are used, the steam being led into them directly from the boilers and given ingress both to the forward-motion and backward-motion parts of these turbines.

This invention relates to a maneuvering apparatus which shall allow at will the turbmes to be run at any speed in the direction which may be re uired and givefull control of the difierent v lves; and it consists, essentially, in the special arrangements and combinations of parts, as will be hereinafter fully described, and pointed out in the appended claims.

The system described hereinafter supposes the use of three turbines; but the same plan may be followed in dealin with a combination of any number of turbmes.

Referring to the annexed drawings, Figure 1 is a vertical section of an apparatus constructed according to the invention. Fig. 2 is a transverse section taken on line 1 1 of Fig. 1. 3 is a view similar to Fig. 1 ,.illustrat ing a modification. Fig. 4 is a transverse section taken on line 3 3 of Fig. 4.

In the said drawings, Ais the steam-pipe, leadin from the boilers. The regulatorvalve is usually left open and is only closed (by a governor) in case of the turbine racin beyond its proper maximum speed.

he steam penetrates into the space 0 C C, which contains two sto -valv es D and E. In the drawings these va ves are shown as of the double-seated balanced type; but other forms may be used. The first valve D is used for running ahead. It admits the steam to the space F, whence it asses through a stramer G into the pipe 8, leadin to the central turbine. The second valve is used for maneuvers, which consist in running the lateral turbines independently at will backward or forward, or stopping them. It 'ves entrance to the steam into the space H, w ere it branches off into the two spaces I I on each side; but before reaching these spaces it must pass through the two valves J J. These valves are only 0 ened during maneuvers and may be kept clbsed .under normal conditions of runnin They constitute in reality a mere safet evice in case one or the other of the latera turbines should be out of order and it should become necessa to isolate it. Strictly speaking, these valves J can be dis-' pensed with, as a turbine can be isolated by means of the distributing-piston, which I shall describe farther on.

The characteristics, particularly of the new system and that which differentiates it from all similar ones hitherto proposed, lies in the method of working the valves D and E. When the vessel is not running, these two valves D and E are closed and kept on their seats by means of the adjustable springs K and L. In this osition they are independent of their working gear, which shall now be described. The stop-valves are controlled by a hand-wheel M, of which the s indleN forms a screw, working in the nut (J lodged in the lever P, pivoted on a trunnion p, suitably mounted in a bracket 1). For ordinary ahead travelingthe stop-valve D must be opened by turning the hand-wheel; but the valve only begins to open when the dead space Q, has been traversed. During the interval in which this takes lace the second stop-valve E is kept closed y the spring L. 95 For maneuvers it is necessary to open the stop-valve E, which is done by turning the hand-wheel in the contrary direction to that necessary for opening D. Here, again, the

valve E only begins to open after traveling 100 through the dead 5 ace R, D being kept closed by the spring Thus the two stopvalves are controlled b a single hand-wheel which gives great simp icity to the mechan- 1sm.

In the above combination the lever P o ens the valves, and the springs K and L c ose them; but this arrangement may be reversed, so as to make the hand-wheel close the valves and the springs open them. In r10 spaces I I. Each of these spaces contains a hollow balanced distributing-piston S, worked by a lever put in motion by a starting-engine.

(Not represented on the drawings.) The distributing-piston S is shown in its mean position, in which all the openings of the antern-valves 'T giving access to the annular passages U and are closed. In its lower position the piston uncovers the openings of the upper lantern-valve, thus allowing the steam to penetrate into the annular passage U and from thence by the pipe W to the corresponding lateral turbine, which it causes to run forward. In its upper position the distributing-piston uncovers the openings of the lower lantern-valve, and the steam passing into the annular passage'V and through the pipe X reaches thecorresponding lateral turbine, which it drives backward.

In the arrangement shown by the drawings the steamis let in above the distributin piston S, over the u per edge of which 1t passes on its way to t e turbine; but the contrary arrangement may be adopted and the steam led into the space between the twopistons and allowed to pass to the turbines by the inner edges of these pistons. If preferred, flat slide-valves may be used instead of the distributing-pistons, making at the same time the starting-engines more powerful on account of the'greater resistance to be overcome.

In the modification shown in Fig. 3 the.

main stopalves D and'E, with their working gearM P, are disposed exactl as in the first arra ement, but the steam distribution while pe ormi maneuvers is entirely different. The distri utin pistons and the startingengines for 'wor 'ng the steam distribution are suppressed, as also are the two precautionary valves J J L Instead of these, two valves 0 and b are fitted on each side, giving access to the cones ondin lateral turbine, one for forward an the ot er for backward running. The working gear of these valves is similar to that of the main stop-valves, but of smaller dimensions, and its method of operation is the same as that described above for the larger valves. ,The main valves are controlled, as before, by the large hand- Wheel M and the maneuvering-valves by the small hand-wheels (Z 11, mounted on spindles e, each working in a nut f, lodged in a lever g, actin as already described with reference to lever% on the rods of the valvesa b, which are kept closed by springs It 1.

Having thus described my invention, what I claim is 1. A starting and maneuvering apparatus for turbine-steamers comprising a main stopvalve, for forward running, a special maneuvering-valve giving the steam access to the lateral turbines onl and a sin lelever and hand-wheel control g both v ves, the opening of. one or the other of these two valves taking lace according to the direction in which t e hand-wheel is turned substantially as described and for the purpose set forth.

2. A starting and maneuvering apparatus for turbine-steamers comprising a main stopvalve, for forward running, a special naneuvering-valve giving the steam access to the lateral turbines only, asin le lever and handwheel controlling both val ves, the opening 01' one or the other of these two valves tak ng lace according to the direction in which the band-wheel is turned and suitably worked, distributingistons for deliverin the steam to the latera turbines so as to al ow these to drive the vessel ahead or astern at will supstantially as described and for the purpose set forth. 7

3. A starting and maneuvering apparatus for turbine-steamers comprising 'a main stopvalve for forward running, a special n1a neuvering-valve giving the steam access to the lateral turbines only, a haird-wheel, a,

screw-threaded s A wheel, a nut in w ioh the said spindle works, a lever supportin the said nut, a trunnion on which the said bever is adapted to be rocked and valve-rods acted upon by the ends of the said lever, the opening of one or the other of the two valves taking places according to the direction n which the hand-wheel is turned, substantially as described and for'the purpose set forth.

4. A startlng and maneuvering apparatus for turbine-steamers comprising a main stopvalve for forward running, a special maneuvering-valve giving thesteam access to the lateral turbines only, a single lever and handwheel controlling both valves, the opening of one or the other-of thesc two valves taking place according to the direction in which the hand-wheel is turned, two stop-valves for each of the lateral turbines and a single lever and hand-wheel device controlling the said stop-valves substantially as described and for the purpose set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

J OHN' KRAFT.

Witnesses:

H. SAVAGE, V. DANS.

indle rotated by saidhand 

